+announces to the system that a removable file system is present on the
+block device \fIspecial\fP or the remote node ``rhost:path''.
+The file \fInode\fP must exist already and
+it must be a directory. It becomes the name of the newly mounted root.
+The optional arguments \fI-r\fP and \fI-w\fP indicate that the file
+system is to be mounted read-only or read-write, respectively.
+If either \fIspecial\fP or \fIfile\fP are not provided, the appropriate
+information is taken from the \fIfstab\fP file. The \fI-f\fP option
+causes everything to be done except for the actual system call; if it's
+not obvious, this ``fakes'' mounting the file system.
+This option is useful in conjunction with the \fI-v\fP flag to
+determine what the
+.I mount
+command is trying to do.
+.PP
+The optional argument \fI-t\fP can be used
+to indicate the file system type.
+The type \fBufs\fP is the default.
+If the type is not one of the internally known types,
+mount will attempt to execute a program in
+.B /sbin/mount_XXX
+where \fBXXX\fP is replaced by the type name.
+The standard mount options (see below) are parsed and
+passed to external program via the \fI-F\fP option
+as a decimal number.
+Any additional options specific to the program can
+be passed as a comma separated list;
+these options are distinguished by starting with a \fI-\fP (dash).
+Those options that take a value are specified
+using the syntax -option=value.
+For example, the mount command:
+.br
+ mount -t mfs -o nosuid,-N,-s=4000 /dev/dk0b /tmp
+.br
+causes mount to attempt to execute:
+.br
+ /sbin/mount_mfs -F 8 -N -s 4000 /dev/dk0b /tmp
+.PP
+Options are specified by a \fI-o\fP argument
+followed by a comma separated string of options.
+The following options apply to any file system that is being mounted:
+.IP "noexec" 12
+Do not allow execution of any binaries on the mounted file system.
+This options is useful for a server that has file systems containing
+binaries for architectures other than its own.
+.IP "nosuid" 12
+Do not allow set-user-identifier or set-group-identifier bits to take effect.
+.IP "nodev" 12
+Do not interpret character or block special devices on the file system.
+This options is useful for a server that has file systems containing
+special devices for architectures other than its own.
+.IP "synchronous" 12
+All I/O to the file system should be done synchronously.
+.PP
+The \fI-u\fP flag indicates that the status of an already mounted file
+system should be changed.
+Any of the options above may be changed;
+also a file system can be changed from read-only to read-write.
+The set of options is determined by first extracting the options
+for the file system from the \fIfstab\fP table,
+then applying any options specified by the \fI-o\fP argument,
+and finally applying the \fI-r\fP or \fI-w\fP option.
+.PP
+The following list can be used to override
+the defaults for an nfs mount:
+.IP "hard" 12
+I/O system calls will retry until the server responds (default)
+.IP "soft" 12
+I/O system calls will fail and return errno after \fIretrans\fP request
+retransmissions
+.IP "bg" 12
+If the first mount request times out, do retries in background
+.IP "intr" 12
+I/O system calls can be interrupted.
+.IP "rsize=#" 12
+Set read size to \fI#\fP bytes.
+.IP "wsize=#" 12
+Set write size to \fI#\fP bytes.
+.IP "retry=#" 12
+Set mount retry count to \fI#\fP.
+.IP "retrans=#" 12
+Set retransmission count for nfs rpc's to \fI#\fP.
+.IP "timeo=#" 12
+Set initial nfs timeout to \fI#\fP in 0.1 sec intervals.
+.fi
projects / unix-history / blobdiff